Morrow tore a tendon sheath in his index finger in early May.
Donaldson has just three hits in 21 at-bats since slugging two home runs in Kansas City on Aug. 12.
Yet another setback in his recovery from a hamstring injury could prevent
Dirks reinjured his hamstring Sunday night while running the bases for Triple-A Toledo. It was the second game of his latest rehab stint.
"Depending on how bad the hamstring is, I don't want to write him off," Brad Ausmus told MLive.com. "But it'd be tough at this point."
The Tigers have not yet recalled Dirks from his rehab assignment, which is his third in less than two months. An announcement is expected Wednesday, a day after an MRI on the hamstring, the results of which has yet to be revealed. Dirks remains on the 60-day disabled list.
A stiff back that has plagued
The Thursday off-day will allow Ackley to rest his back for two straight days.
Davis has been on a mini-roll with seven hits in his last 21 at-bats.
Cotts has been solid for Texas this season despite a 2-7 record. He has allowed 52 hits in 54 1/3 innings with 20 walks and 58 strikeouts.
Zunino emerged from a slump Tuesday night with two hits and two RBI. The performance ended a five-game hitless streak in which he was 0 for 16.
A matchup against tough southpaw Cole Hamels has
Ackley, whose .266 average against lefties this year is better than his mark against righties, has four hits and two walks in his last two games.
Despite a mini-tear at the plate,
"Maybe I'm not trying to do too much because I can't," he said. "That's my only explanation, but [the thumb injury] is definitely not in the past. ... Swings and misses don't feel good. I've just got to limit that."
Hardy is 7 for 20 with a home run since his return. He has fanned just twice during that stretch.